[U-Boot] [PATCH v2 1/3] ARM: cache: add an empty stub function for invalidate/flush dcache

Josh Wu
2015-06-08T02:05:04Z

Hi, Marek

On 6/5/2015 9:18 PM, Marek Vasut wrote:
> On Friday, June 05, 2015 at 09:47:30 AM, Josh Wu wrote:
>> Since some driver like ohci, lcd used dcache functions. But some ARM
>> cpu don't implement the invalidate_dcache_range()/flush_dcache_range()
>> functions.
>>
>> To avoid compiling errors this patch adds an weak empty stub function
>> for all ARM cpu.
>>
>> And each cpu can implement its own implementation. If not implemented
>> by default it will use an empty function.
>>
>> Signed-off-by: Josh Wu <josh.wu@atmel.com>
>> ---
>>
>> Changes in v2: new added
>>
>> arch/arm/lib/cache.c | 9 +++++++++
>> 1 file changed, 9 insertions(+)
> So, why exactly can't this be entirely common code , but a CPU-specific
> code ? :)

Do you mean to make those empty functions as common code for all arch
cpu to use? It seems there is no place to put common code for all arch cpu.

Best Regards,
Josh Wu

>
> Best regards,
> Marek Vasut